EP0751511A3 - Magneto-optical disc - Google Patents

Magneto-optical disc Download PDF

Info

Publication number: EP0751511A3
Authority: EP; European Patent Office
Prior art keywords: magneto; optical disc; disc; optical
Prior art date: 1995-06-30
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP96110244A

Other languages

German (de)

French (fr)

Other versions

EP0751511B1 (en

EP0751511A2 (en

Inventor

Yoshihito Fukushima

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Sony Corp

Original Assignee

Sony Corp

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1995-06-30

Filing date

1996-06-25

Publication date

1997-06-25

1996-06-25 Application filed by Sony Corp filed Critical Sony Corp

1997-01-02 Publication of EP0751511A2 publication Critical patent/EP0751511A2/en

1997-06-25 Publication of EP0751511A3 publication Critical patent/EP0751511A3/en

2001-11-07 Application granted granted Critical

2001-11-07 Publication of EP0751511B1 publication Critical patent/EP0751511B1/en

2016-06-25 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

Classifications

- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements

EP96110244A 1995-06-30 1996-06-25 Magneto-optical disc Expired - Lifetime EP0751511B1 (en)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
JP16664295		1995-06-30
JP7166642A JPH0917056A (en)	1995-06-30	1995-06-30	Magneto-optical disk
JP166642/95		1995-06-30

Publications (3)

Publication Number	Publication Date
EP0751511A2 EP0751511A2 (en)	1997-01-02
EP0751511A3 true EP0751511A3 (en)	1997-06-25
EP0751511B1 EP0751511B1 (en)	2001-11-07

Family

ID=15835064

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP96110244A Expired - Lifetime EP0751511B1 (en)	1995-06-30	1996-06-25	Magneto-optical disc

Country Status (5)

Country	Link
US (1)	US5751670A (en)
EP (1)	EP0751511B1 (en)
JP (1)	JPH0917056A (en)
KR (1)	KR970002970A (en)
DE (1)	DE69616662T2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP2000228040A (en) *	1999-02-04	2000-08-15	Sony Corp	Magneto-optical recording medium
JP4107767B2 (en) *	1999-06-23	2008-06-25	ソニー株式会社	Optical recording medium, recording / reproducing method and recording / reproducing apparatus using the same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH01253848A (en) *	1988-03-31	1989-10-11	Matsushita Electric Ind Co Ltd	Information recording carrier
JPH0383238A (en) *	1989-08-25	1991-04-09	Fujitsu Ltd	Magneto-optical disk
JPH043350A (en) *	1990-04-20	1992-01-08	Teijin Ltd	Magneto-optical recording medium
JPH04205938A (en) *	1990-11-30	1992-07-28	Hitachi Ltd	Optical recording method
JPH05298762A (en) *	1992-04-15	1993-11-12	Ricoh Co Ltd	Magneto-optic recording medium
JPH0628724A (en) *	1992-07-10	1994-02-04	Ricoh Co Ltd	Magneto-optical recording medium
JPH06267128A (en) *	1993-03-15	1994-09-22	Nec Corp	Magneto-optical disk

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP3301621B2 (en) *	1991-05-30	2002-07-15	ティーディーケイ株式会社	Manufacturing method of optical recording disk

1995
- 1995-06-30 JP JP7166642A patent/JPH0917056A/en not_active Withdrawn
1996
- 1996-06-25 EP EP96110244A patent/EP0751511B1/en not_active Expired - Lifetime
- 1996-06-25 DE DE69616662T patent/DE69616662T2/en not_active Expired - Fee Related
- 1996-06-28 KR KR1019960024836A patent/KR970002970A/en not_active Application Discontinuation
- 1996-06-28 US US08/672,717 patent/US5751670A/en not_active Expired - Fee Related

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH01253848A (en) *	1988-03-31	1989-10-11	Matsushita Electric Ind Co Ltd	Information recording carrier
JPH0383238A (en) *	1989-08-25	1991-04-09	Fujitsu Ltd	Magneto-optical disk
JPH043350A (en) *	1990-04-20	1992-01-08	Teijin Ltd	Magneto-optical recording medium
JPH04205938A (en) *	1990-11-30	1992-07-28	Hitachi Ltd	Optical recording method
JPH05298762A (en) *	1992-04-15	1993-11-12	Ricoh Co Ltd	Magneto-optic recording medium
JPH0628724A (en) *	1992-07-10	1994-02-04	Ricoh Co Ltd	Magneto-optical recording medium
JPH06267128A (en) *	1993-03-15	1994-09-22	Nec Corp	Magneto-optical disk

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 001 (P - 985) 8 January 1990 (1990-01-08) *
PATENT ABSTRACTS OF JAPAN vol. 015, no. 255 (P - 1221) 27 June 1991 (1991-06-27) *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 151 (P - 1337) 14 April 1992 (1992-04-14) *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 551 (P - 1453) 20 November 1992 (1992-11-20) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 103 (P - 1696) 18 February 1994 (1994-02-18) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 250 (P - 1736) 12 May 1994 (1994-05-12) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 685 (P - 1848) 22 December 1994 (1994-12-22) *

Also Published As

Publication number	Publication date
EP0751511B1 (en)	2001-11-07
JPH0917056A (en)	1997-01-17
DE69616662T2 (en)	2002-08-08
US5751670A (en)	1998-05-12
DE69616662D1 (en)	2001-12-13
KR970002970A (en)	1997-01-28
EP0751511A2 (en)	1997-01-02

Legal Events

Date	Code	Title	Description
1996-11-15	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1997-01-02	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): DE FR GB
1997-05-09	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1997-06-25	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): DE FR GB
1998-01-14	17P	Request for examination filed	Effective date: 19971114
2000-01-26	17Q	First examination report despatched	Effective date: 19991213
2001-02-07	GRAG	Despatch of communication of intention to grant	Free format text: ORIGINAL CODE: EPIDOS AGRA
2001-04-25	GRAG	Despatch of communication of intention to grant	Free format text: ORIGINAL CODE: EPIDOS AGRA
2001-04-25	GRAH	Despatch of communication of intention to grant a patent	Free format text: ORIGINAL CODE: EPIDOS IGRA
2001-07-28	GRAH	Despatch of communication of intention to grant a patent	Free format text: ORIGINAL CODE: EPIDOS IGRA
2001-09-21	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
2001-11-07	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): DE FR GB
2001-12-13	REF	Corresponds to:	Ref document number: 69616662 Country of ref document: DE Date of ref document: 20011213
2002-01-01	REG	Reference to a national code	Ref country code: GB Ref legal event code: IF02
2002-06-25	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020625
2002-09-13	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
2002-09-13	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
2002-10-30	26N	No opposition filed
2003-02-12	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 20020625
2003-02-28	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030228
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2003-07-07	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 20030707 Year of fee payment: 8
2005-01-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050101

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